South Korean President Lee Myung-bak arrived in Ethiopia on Friday for a three-day visit that includes economic cooperation talks with Prime Minister Meles Zenawi and a series of activities paying tribute to Ethiopia\'s participation in the Korean War. Ethiopia is one of the 16 nations that sent combat troops as part of U.N. forces to help South Korea repel invading North Korean troops during the 1950-53 Korean War. A total of 3,520 Ethiopian troops were dispatched, with 121 of them killed and 535 injured